Access Denied CTF 2022
17 challenges with 18 published community solutions between them. Solution links go to CTFtime’s task page, which aggregates every writeup for a challenge - individual blog posts rot, the aggregator does not.
Full task list on CTFtimeMisc6
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
Bobs Favourite Number
1 writeupSame technique in picoCTF: Permissions, Specialer, Codebook
Oob
1 writeupSame technique in picoCTF: Permissions, Specialer, Codebook
oob2
1 writeupSame technique in picoCTF: Permissions, Specialer, Codebook
Read
1 writeupSame technique in picoCTF: Permissions, Specialer, Codebook
Shark 1
1 writeupSame technique in picoCTF: Permissions, Specialer, Codebook
Write
1 writeupSame technique in picoCTF: Permissions, Specialer, Codebook
Binary exploitation5
Turn a memory-safety bug in a native binary into control of execution. Usually a stack overflow, a format string, or a heap primitive.
- pwn
Same technique in picoCTF: Guessing Game 1, x-sixty-what, format string 3
- format-string
- pwn
Same technique in picoCTF: format string 3, Binary Gauntlet 2, Binary Gauntlet 3
ret2libc
1 writeupSame technique in picoCTF: Guessing Game 1, x-sixty-what, format string 3
ret2win
1 writeupSame technique in picoCTF: Guessing Game 1, x-sixty-what, format string 3
shellcode
1 writeupSame technique in picoCTF: Binary Gauntlet 2, ropfu, solfire
Reverse engineering4
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
- reversing
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
- reversing
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
- reversing
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
- reversing
Same technique in picoCTF: WinAntiDbg0x100, WinAntiDbg0x200, WinAntiDbg0x300
Cryptography1
Recover a plaintext or a key from something that was supposed to protect it. In practice: identify the scheme, find the parameter the author got wrong, exploit it.
reused key
1 writeup- crypto
Same technique in picoCTF: StegoRSA, Timestamped Secrets, AES-ABC
Web1
Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.
- web
Same technique in picoCTF: Client-side-again, dont-use-client-side, Irish-Name-Repo 3